TARC/CCL17 蛋白, Human (sf9)

TARC/CCL17 Protein, Human (sf9) is the first CC chemokine identified to interact with T cells with high affinity and bind to the CCR4 receptor to mediate inflammation, cancer, and autoimmune related diseases. TARC/CCL17 Protein, Human (sf9) is a recombinant human TARC/CCL17(M1-S94) protein expressed by Sf9 insect cells^[1][2].

CCL17，也称为胸腺和激活调节趋化因子（TARC），是一种通常与2型免疫反应相关的强大趋化因子，其编码基因位于人类16号染色体上。CCL17 可由胸腺细胞和抗原呈递细胞（例如树突状细胞、巨噬细胞和单核细胞）产生，并通过与细胞表面趋化因子受体 CCR4 结合而发挥作用。CCR4 是一种 G 蛋白偶联受体，在 Th2 细胞、皮肤淋巴细胞、皮肤定位 T 细胞和调节性 T 细胞以及成人 T 细胞白血病/淋巴瘤和皮肤 T 细胞淋巴瘤的 T 细胞上表达为趋化因子受体。CCR4 在中枢神经系统 (CNS) 免疫稳态的调节和先天免疫细胞的激活中发挥重要作用。CCL17 在 CCR4 阳性 Th2 淋巴细胞的募集中发挥重要作用，参与嗜酸性粒细胞相关疾病（包括 AA 和 AD）中 Th2 细胞的转运，并可能参与某些 T 细胞淋巴瘤中肿瘤细胞的转运CCL17 也被认为是一种稳态和诱导型神经调节趋化因子，可在稳态条件下维持海马小胶质细胞典型的高度分支形态，并促进小胶质细胞形态对急性 LPS 诱导的神经炎症的适应。CCL17 还与自身免疫性和过敏性疾病相关^[1][2]。

CCL17 (-1 ng/mL) can significantly induce CD⁴⁺ CD²⁵⁺ cell migration, but not CD⁴⁺ CD^25-cell migration in a dose-dependent manner in the cells purified from regional lymph nodes of gastric cancer patients^[3].
CCL17 (1-1, ng/mL, 12-48 h) can induce cell migration in human epithelial colon adenocarcinoma cell line HT-29 and is dependent on CCR4-mediated RhoA/Rho-kinase signaling, and CCL17-induced cell migration can be inhibited by preincubation with antibodies against CCR4 or antagonists against CCR4^[4].

Human

Sf9 insect cells

Tag Free

Q92583 (M1-S94)

6361  [NCBI]

Approximately 10 kDa

Greater than 95% as determined by reducing SDS-PAGE

无菌粉末.

Lyophilized from a 0.2 μm filtered solution of PBS, pH 7.5. Normally 5 % - 8 % trehalose, mannitol and 0.01% Tween 80 are added as protectants before lyophilization.

<1 EU/μg, determined by LAL method.

It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH₂O.

Stored at -20°C for 2 years. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer (with carrier protein). It is recommended to freeze aliquots at -20°C or -80°C for extended storage.

Room temperature in continental US; may vary elsewhere.

• [1]. Julien Catherine, et al. What does elevated TARC/CCL17 expression tell us about eosinophilic disorders? Semin Immunopathol. 2021 Jun;43(3):439-458.  [Content Brief]

  [2]. Jan Korbecki, et al. CC Chemokines in a Tumor: A Review of Pro-Cancer and Anti-Cancer Properties of the Ligands of Receptors CCR1, CCR2, CCR3, and CCR4. Int J Mol Sci. 2020 Nov 9;21(21):8412.  [Content Brief]

  [3]. Yoshiki Mizukami, et al. CCL17 and CCL22 chemokines within tumor microenvironment are related to accumulation of Foxp3+ regulatory T cells in gastric cancer. Int J Cancer. 2008 May 15;122(10):2286-93.  [Content Brief]

  [4]. Amr A Al-haidari, et al. CCR4 mediates CCL17 (TARC)-induced migration of human colon cancer cells via RhoA/Rho-kinase signaling. Int J Colorectal Dis. 2013 Nov;28(11):1479-87.  [Content Brief]